The role of the power adapter

Power adapter is also called external power supply (switching power adapter), it is a small portable electronic equipment and electronic electrical power supply voltage conversion equipment, it is produced because in real life, electronic devices are often not directly use household power, because the home is used is 220 volts of power supply voltage, The power supply voltage required by the general electronic products is about 5 to 20 volts. So the role of the power adapter is crucial (modular power supply). With it, we can use these electronic products conveniently and safely. So, what is the role of the power adapter? For this problem, through collecting and sorting out the data, it has carried on the simple summary.

Composition and Application of power adapter (Working principle of power adapter)

Power adapters are commonly found in small electronics such as mobile phones, LCD monitors and laptops. Generally consists of shell, power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type; According to the connection mode, it can be divided into wall type and desktop type. Widely used in telephone motherboard, game machine, language repeater, walkman, laptop computer, cellular phone and other equipment.

Power adapter for computer

The power adapter is widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communications equipment, electrical equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifier, electronic refrigerator, LCD, LED lamps and lanterns, communications equipment, audio and video products, security, computer case, digital products and equipment, and other fields, And in these areas have a role can not be ignored. So what are the functions of the power adapter?

The role of the power adapter

Generally speaking, the functions of power adapters are transformers and rectifiers. The ac power of the home is 220v, and the DC power of our computer is 12V (as if), so it is certain that the power adapter is a transformer and rectifier. The adapter is a transformer, so we should all know that AC 220V is changed by transformer and dc is changed by rectifier. There is consumption here, and these consumption will be converted into heat, so it is normal for the power adapter to heat. The transformer is made of silicon steel sheet. When the transformer is energized, magnetic flux will be generated. Magnetic flux will cause the effect of force between the silicon steel sheet, thus producing a buzzing sound, which is normal. But the sound of overfire is abnormal, for many reasons: 1. The ac voltage is unstable. 2. Chip damage. 3, inter-turn short circuit. 4, component damage and so on. Adapters, by the way, are used to convert ALTERNATING current into direct current electronics

Power adapter space is generally built-in, general adapter volume is not small, small size of the machine are external, in order to save space, two to replace is also convenient, the adapter with the mains, the voltage is relatively high, put the machine is more dangerous inside

Points to note when using a power adapter

Note several items on the label of the power adapter (hereinafter called Adapter).

1. The type of Adapter, for example, the type of adapter is KZ-120100. It tells us several information, including its manufacturer and wattage, etc.
2. The INPUT of adapter is generally 100-240V~50-60Hz in China, which means that the Adapter can work normally under the voltage of 100V-240V;
3. The OUTPUT of adapter, two numbers can be quickly calculated the wattage of the adapter, for example, the adapter, voltage 12V* current 1A=12W(power), indicating that the power supply is 12W Adapter.

Most laptop power adapters can be used for 100 to 240V ac (50/60 hz). Basically most of the notebook computers have power external, with a power cord and the host connected, which can reduce the size and weight of the host, only a very small number of models have power built in the host.

Have a nameplate on the power adapter, marked on the power, input and output voltage and power flow indicators, such as paying special attention to the range of input voltage, this is the so-called “travel power adapter,” if a country to the mains voltage is 110 v, this feature is very useful, some of the gray notebook computers are sold only in country of origin, There is no such compatible voltage design, even only a single input voltage of 110V, in China’s 220V mains voltage plug will burn.